WO2018176899A1 - Polygonal honeycomb plate and production process therefor - Google Patents

Abstract

Disclosed are a polygonal honeycomb plate and a production process therefor. The honeycomb plate is used as a plate inside a passenger vehicle or railway carriage, and comprises a honeycomb core (2) and panels at two sides of the honeycomb core (2), wherein the cross section of the honeycomb core (3) is a regular polygon, and the honeycomb core (2) and the panels form an integrally formed structure.The honeycomb plate production process involves the production methods of graded extrusion before rolling and then hot melting so as to realise the forming of the integrated structure of the honeycomb plate. Using the integrally formed honeycomb plate can effectively improve the bearing mechanical performance of the chassis of a passenger vehicle and a railway carriage, and a matching integrally forming production process solves the existing machining difficulties of honeycomb cores.

Description

 Technical field

 [0001] The present invention relates to a polygonal honeycomb panel and a production process thereof.

 Background technique

 [0002] Honeycomb panels are commonly used in the floors of various types of passenger vehicles and rail trains because of their light weight and high strength. However, most of the existing honeycomb panels use a cylindrical honeycomb core, and the tangent wall thickness of the cylindrical honeycomb core. It is very small, which greatly reduces the bearing mechanical properties of the product. In order to achieve certain bearing mechanical properties, the honeycomb panel needs to change the tangent wall thickness between the cylinders, which directly affects the density of the product and increases the cost.

 [0003] Chinese Patent Application No. 201210262523.4 discloses a honeycomb panel, a method of manufacturing the same, and a railroad train floor, the drawing of which discloses a honeycomb panel having a hexagonal honeycomb core section, hexagonal The honeycomb panel has better mechanical properties than the cylindrical honeycomb panel. However, in the process of processing the hexagonal honeycomb core, since the hexagon has an angular shape, there is a defect that the drawing is difficult, and the scrap rate is high, and the same. The honeycomb core is glued to the panels on both sides, resulting in defects in the integrity of the honeycomb panel, thereby affecting the overall performance of the honeycomb panel.

technical problem

 The technical problem solved by the present invention is to provide a novel polygonal honeycomb panel and a production process thereof for the overall performance and processing defects of the existing honeycomb panel.

 Problem solution

 Technical solution

[0005] The present invention adopts the following technical solutions:

 [0006] A polygonal honeycomb panel, the honeycomb panel is used for a panel inside a passenger car or a rail train, and includes a honeycomb core and a panel on both sides of the honeycomb core, the honeycomb core has a regular polygon in cross section, and the honeycomb core An integral structure is formed between the panel and the panel.

[0007] Further, the honeycomb core has a thickness of 2 mm to 25 mm, and the thickness of the side panels is 0.5 mm to 5 mm.

[0008] The present invention also discloses a production process of the above polygonal honeycomb panel, comprising the following steps: [0009] (1), extruding a first preform, the first preform is a honeycomb core and a planar integral blank of one side panel;

 [0010] (2) pressing a side surface of the first preform by a honeycomb type punch, the height of the honeycomb type punch being smaller than the thickness of the first blank, forming a honeycomb core and one side panel integral thereof Second blank;

[0011] (3), extruding a third preform, the third preform is a plane blank of the other side panel of the honeycomb core;

[0012] (4) thermally melting the second preform and the third preform to form a honeycomb core and a honeycomb panel integrally formed on both side panels;

 [0013] (5) cooling the honeycomb panel in the step (4), and then cutting the cooled honeycomb panel.

[0014] Further, the first blank in the step (1) and the third raw material in the third step are heated in an extruder to 170 ° C - 200 ° C, extruded through a die The temperature of the crucible is 190 ° C - 210 ° C.

[0015] Further, the honeycomb type punch in the step (2) is a forming roller provided with a honeycomb type protrusion, the forming roller and a smooth roller pair roller, and the first blank The side surface is subjected to honeycomb core roll forming, and a stripping roller is disposed on a rear side of the forming roll to roll and unwind the surface of the honeycomb core of the second green body.

 [0016] Further, the hot melt process in the step (4) is pressed against the roller by the heated smooth roller.

[0017] Further, the roller rotation speed in the steps (2) and (4) is 300 rpm-1200 rpm, and the smooth roller temperature of the hot melt process is set at 90 ° C - 120 ° C .

[0018] Further, the second preform is further heated by a smooth roller before the hot melt, and the heated smooth roller temperature is set at 300 ° C - 350 ° C.

[0019] Further, the cooling process in the step (5) adopts a honeycomb panel to perform traction cooling on the rollers through a plurality of sets of cooling rollers, and the temperature of the cooling rollers is set at 30° C.-70° C. The cooling roller has a pressure of 1.0 MPa to 5.0 MPa to the honeycomb panel, and the roller rotation speed is 300 rpm to 1500 rpm.

[0020] In the production process of the present invention, the raw materials of the first preform and the third preform are PP, PE, ABS or P

C material.

 [0021] The honeycomb panel of the present invention adopts an integral structural plate with a regular polygonal cross section, which can effectively improve the mechanical properties of the bottom plate of the passenger car and the railway train, and solve the processing problem of the honeycomb core through the integrated integrated molding production process.

Advantageous effects of the invention Beneficial effect

[0022] Specifically, the following beneficial effects are obtained:

 [0023] (1): "Structural stability", the honeycomb panel is not bonded by other materials such as glue, so that one panel and the honeycomb core are directly formed into one body, and the other panel is fused together at a high temperature to become a complete body. Honeycomb panel

 [0024] (2): "Good performance", the honeycomb core section is a regular polygon, and the mechanical properties and bearing capacity of the regular polygon are greatly improved;

 [0025] (3) : "Low density", under the same mechanical properties, the plastic regular polygon honeycomb panel has a lower density

, lighter weight;

 [0026] (4): "Environmental protection", the honeycomb panel is made of polymer plastic (ABS, PC, PP, PE) material, and the plastic material has the environmental advantages of recycling and recycling, and the advantages of sustainable use.

[0027] The present invention will be further described below in conjunction with the drawings and specific embodiments.

 Brief description of the drawing

 DRAWINGS

 1 is a schematic structural view of a honeycomb panel in an embodiment.

[0029] Reference numerals in the figure: 1- top panel, 2-cell core, 3- bottom panel.

BEST MODE FOR CARRYING OUT THE INVENTION

Example

 [0031] This embodiment is described by taking a honeycomb plate having a regular hexagonal cross section as an example, but the protection range of the present invention is not limited to a honeycomb plate having a regular hexagonal cross section.

 [0032] As shown in FIG. 1, the honeycomb panel in this embodiment includes a top panel 1, a honeycomb core 2, and a bottom panel 3 which are sequentially stacked, wherein the top panel 1 and the bottom panel 3 are planes having a thickness of 0.5 mm to 5 mm. The sheet metal, the honeycomb core 2 is a mesh plate having a hexagonal cross-section honeycomb hole, and has a thickness of 2 mm to 25 mm. The honeycomb core 2 and the top panel 1 and the bottom panel 3 on both sides are integrally formed and connected, and can be used for cutting. The laying of panels inside passenger cars or rail trains, including but not limited to the floor and side panels in the cabin.

[0033] The honeycomb panel in the embodiment is processed by using PP, PE, ABS or PC materials as raw materials, and the specific production process is as follows: [0034] (1) Extrusion of the first preform, the first preform being a planar integral preform of the honeycomb core 2 and the bottom panel 3. The first preform is formed by subjecting the raw material to an extruder to be heated to 170 ° C - 200 ° C to be plasticized into a molten state, and then extruding the sheet by a mold heated to 190 ° C - 210 ° C. The thickness of the first preform is equal to the thickness of the honeycomb core 2 and the bottom panel 3, and is 2.5 mm to 30 mm thick;

 [0035] (2) performing a honeycomb hole compression molding on the top side surface of the extruded first preform by a honeycomb type punch, the height of the honeycomb type punch being smaller than the thickness of the first preform, forming a honeycomb core and A second blank integrated with one side panel. The honeycomb die is formed by passing the first preform through a forming roller provided with a plurality of regular hexagonal honeycomb-shaped projections and a smoothing roller, and the first preform passes through the honeycomb-shaped convex on the forming roller. Starting from the top surface of the first preform, the honeycomb hole is rolled, and a stripping roller is arranged on the rear side of the forming roller, and the demolding roller is a smooth roller, and the second blank is rolled and then pulled The surface of the honeycomb core of the mold is guided and stripped, and the second blank released from the forming roller is guided and transported to the heating roller before the step (4) for heating, so as to prevent the second blank from being on the forming roller. Deformation due to adhesion during the stripping process. In this step, the forming roller and the smoothing roller directly roll the extruded first preform without heat treatment, and the roller rotation speed during the rolling process is 300 rpm to 1200 rpm.

 [0036] (3), in carrying out the step (2), the third blank is extruded, and the third blank is a flat blank of the top panel 1 on the top side of the honeycomb core 2. The third preform is formed by subjecting the raw material to an extruder to be heated to 170 ° C - 200 ° C to be plasticized into a molten state, and then extruding the sheet by a mold heated to 190 ° C - 210 ° C. The thickness of the third preform is equal to the thickness of the top panel 1, and is 0.5 mm to 5 mm.

 [0037] (4), the second blank in the step (2) and the third blank in the (3) step are hot-melted to form a honeycomb core and a honeycomb panel integrally formed on both side panels, after molding The thickness of the honeycomb panel is between 3mm and 35mm. Wherein, since the second preform has been subjected to roll forming and the temperature is lowered a part, the second preform is first passed through a heated smoothing roller of the pair of rollers, and the temperature of the smoothing roller is set at 300 ° C - 350 ° C, The surface of the second preform is maintained in a molten state capable of being melted. The hot melt of the second preform and the third preform is additionally pressed by the heated smooth roller, and the third blank is guided by the roller to be laid on the side of the second preform rolled with the honeycomb hole, and then together The temperature of the two sets of smooth rolls of the hot melt process is set between 90 ° C and 120 ° C and the speed of the rolls is between 300 rpm and 1200 rpm.

 [0038] (5) cooling the honeycomb panel in the step (4), and then cutting the cooled honeycomb panel.

The cooling process winds the honeycomb panels through a plurality of sets of cooling rolls for roll traction cooling. Cooling roller The smooth roller, the temperature of the roller is set at 30 ° C -70 ° C, the traction pressure of the cooling roller to the honeycomb panel is 1.0 Mpa-5.0 Mpa, and the roller rotation speed is 300 rpm-1500 rpm. The cooled honeycomb panel is conveyed by a pulling roller to a longitudinal saw or a lateral saw to cut the size of the honeycomb panel.

 Table 1 below shows the test results of the static bending strength (lateral direction), the static bending strength (longitudinal direction), and the static elastic modulus of the honeycomb panel of the present embodiment.

 [0040] Table 1. Static bending strength (lateral), static bending strength (longitudinal), static bending modulus test results

[]

 [0041] Table 2 below shows the test results of the impact toughness test using the honeycomb panel of the present embodiment.

Table 2. Impact toughness test results

 The above embodiments describe the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The foregoing embodiments and descriptions are merely illustrative of the present invention. The invention is not limited to the spirit and scope of the invention, and various changes and modifications may be made without departing from the spirit and scope of the invention. The claims and their equivalents are defined.

Claims

Claims [Claim 1] A polygonal honeycomb panel, wherein the honeycomb panel is used for a panel inside a passenger car or a rail train, and includes a honeycomb core and a panel on both sides of the honeycomb core, the horizontal of the honeycomb core The cross section is a regular polygon, and the honeycomb core and the panel are integrally formed. [Claim 2] A polygonal honeycomb panel according to claim 1, wherein the honeycomb core has a thickness of 2 mm to 25 mm and the side panels have a thickness of 0.5 mm to 5 mm. [Claim 3] The production process of the polygonal honeycomb panel of claims 1-2, comprising the steps of:  (1) extruding a first preform, the first preform being a honeycomb core and a flat integral blank of one of the side panels;  (2) pressing a side surface of the first preform by a honeycomb type punch, the height of the honeycomb type punch being smaller than the thickness of the first blank, forming a honeycomb core and a second material in which one side panel is integrated Billet  (3) extruding a third preform, the third blank being a planar blank of the other side panel of the honeycomb core;  (4) thermally melting the second preform and the third preform to form a honeycomb core and a honeycomb panel integrally formed on both side panels;  (5), cooling the honeycomb panel in step (4), and then cutting the cooled honeycomb panel.  [Claim 4] A process for producing a polygonal honeycomb panel according to claim 3, wherein the first preform in the step (1) and the third blank in the step (3) are in an extruder The medium is heated to 170 ° C - 200 ° C, and the temperature of extrusion through a die is 190 ° C - 210 ° C.  [Claim 5] The production process of a polygonal honeycomb panel according to claim 3, wherein the honeycomb type punch in the step (2) is a forming roller provided with a honeycomb type projection, the forming roller The wheel and a smooth roller pair roll are subjected to honeycomb core rolling forming on the side of the first preform.  [Claim 6] A process for producing a polygonal honeycomb panel according to claim 5, wherein the hot-melt process in the step (4) is pressed against the roller by the heated smooth roller. [Claim 7] A process for producing a polygonal honeycomb panel according to claim 6, wherein the step (2) And the roller speed in the step (4) is 300 _r pm - 1200 rpm, and the smooth roller temperature of the hot melt process is set at 90 ° C - 120 ° C. [Claim 8] The production process of a polygonal honeycomb panel according to claim 3, wherein the second preform is further heated by a smooth roller before the hot melt, the heated smooth roller The temperature is set between 300 ° C and 350 ° C.  [Claim 9] The production process of a polygonal honeycomb panel according to claim 3, wherein the cooling process in the step (5) uses a honeycomb panel to perform cooling on the roller by a plurality of sets of cooling rollers. The temperature of the cooling roller is set at 30 ° C - 70 ° C, the traction pressure of the cooling roller to the honeycomb panel is 1.0 MPa - 5.0 MPa, and the roller rotation speed is 300 rpm - 1500 rpm.  [Claim 10] A process for producing a polygonal honeycomb panel according to any one of claims 3-9, wherein the raw materials of the first preform and the third preform are PP, PE, ABS or PC materials.